Extensions are like apps for Firefox.
They add features to Firefox to make browsing faster, safer, or just plain fun.
Dark mode for every website. Take care of your eyes, use dark theme for night and daily browsing.
Automatically learns to block invisible trackers.
Privacy Possum monkey wrenches common commercial tracking methods by reducing and falsifying the data gathered by tracking companies.
Override the user-agent string presented to Google Search pages to receive the search experience shown to Chrome.
The best security you can get in a web browser! Allow potentially malicious web content to run only from sites you trust. Protect yourself against XSS other web security exploits.
Encrypt the web! HTTPS Everywhere is a Firefox extension to protect your communications by enabling HTTPS encryption automatically on sites that are known to support it, even when you type URLs or follow links that omit the https: prefix.
A powerful reverse image search tool, with support for various search engines, such as Google, Bing, Yandex, Baidu and TinEye.
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
Some sites may not work with Firefox for Android video background play feature. This add-on provides a quick fix by blocking the Page Visibility API and the Fullscreen API.
YouTube High Definition is a powerful tool that automatically plays all YouTube videos in HD, changes video player size, offers auto-stop and mute, and much more.